Rather than a Balikbayan stamp (which does not allow you to legally work) you can reclaim your citizenship (be a dual citizen (US/Philippine) and have all the rights and privileges of citizenship including the right to work without restriction.

Having that US passport will put you in the "Native speaker" category enabling you to get work in the assorted Korean and Japanese language schools with wages in line with a foreigner rather than a local (50,000 pesos per month instead of 15,000).

You won't bank a lot of money to send back to the states but you will enjoy a comfortable lifestyle while you are there for as long as you want to stay there.
MOD EDIT

@Ajarn. How are you calculating a monthly pay of $38? The ad you refer to states 20K to 30K and uses the dollar sign rather than php.
If the amounts are USD, then the monthly is over $1000 per month.
With the php being about 40/USD, the monthly would be 40,000php per month.
you can always check a foreign currency site for most recent php/USD.